This letter, for instance- should have been given to members of the team,the coach and managers

Do you need punctuation and spacing corrected?

This letter, for instance, should have been given to members of the team, the coach, and managers.

The last comma depends on the type of grammar style/whatever style of writing. . . I don't remember what it's called. The last comma is optional depending on writing style, I guess I'm trying to say.